Sync templates from WhatsApp

Reconcile this project's templates against WhatsApp. Two things happen per connected WhatsApp Business Account: templates that exist on Meta but not in Zavu are imported (or linked to an existing template with the same name), and the approval status of the templates Zavu already knows about is refreshed from Meta.

This is what to call when a template was created outside Zavu — in Meta Business Manager, or by another tool — or when a template.status_changed webhook was missed and a template is stuck in pending. Status changes normally arrive by webhook; this endpoint is the recovery path and the only path for a template Zavu never created.

Templates that Meta reports as rejected or disabled are not imported; they are counted in skipped. Existing local templates are matched first by Meta template ID, then by name.

By default every sender in the project with a WhatsApp Business Account is synced. Pass senderId to sync only that sender's account. The call is synchronous — it waits for Meta and returns what changed — so it can take a few seconds per account. A failure on one account does not fail the request: it is reported in errors and the remaining accounts are still synced.

{
  "senderId": "sender_12345"
}